#311FA1#311FA1

#311FA1 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 36.9% C 0.193 H 277.4°. Best body text is #FFFFFF at 11.41:1 contrast (WCAG AA passes).

Color values

HEX	#311FA1
RGB	rgb(49, 31, 161)
HSL	hsl(248, 68%, 38%)
HSV	hsv(248, 81%, 63%)
CMYK	cmyk(69.6%, 80.7%, 0%, 36.9%)
CIE-LAB	lab(24.34, 46.95, -66.26)
CIE-LCH	lch(24.34, 81.20, 305.32°)
OKLab	oklab(36.86% 0.0249 -0.1914)
OKLCH	oklch(36.86% 0.193 277.4)
XYZ	xyz(8.1875, 4.2054, 34.0916)
Luminance	0.0421 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311FA1 #8FA11F

analogous

#1F4EA1 #311FA1 #721FA1

triadic

#311FA1 #A1311F #1FA131

tetradic

#311FA1 #A11F4E #8FA11F #1FA172

square

#311FA1 #A11F4E #8FA11F #1FA172

split-complementary

#311FA1 #A1721F #4EA11F

monochromatic

#120B3A #21156E #311FA1 #4129D4 #6D5BDF

Accessibility & contrast

On white

11.41

#311FA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#311FA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311FA1

11.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311FA1	#FFFFFF	#000000	##FFFFFF
##311FA1	1.00	11.41	1.84	11.41
#FFFFFF	11.41	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003FA5

Deuteranopia (green-blind)

#00349F

Tritanopia (blue-blind)

#004760

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #311fa1;
/* rgb */ color: rgb(49, 31, 161);
/* oklch */ color: oklch(36.9% 0.193 277.4);

Tailwind

colors: {
  custom: {
    50: '#7b5fbe',
    500: '#311fa1',
    950: '#000000',
  },
}

SCSS

$custom: #311fa1;
$custom-light: #7b5fbe;
$custom-dark: #000000;

JSON

{
  "hex": "#311fa1",
  "rgb": {
    "r": 49,
    "g": 31,
    "b": 161
  },
  "hsl": {
    "h": 248.308,
    "s": 67.708,
    "l": 37.647
  },
  "oklch": {
    "l": 0.36864,
    "c": 0.19307,
    "h": 277.4
  },
  "luminance": 0.04206
}

Semantic roles & 50–950 ramp

primary

#311FA1

secondary

#B5C458

accent

#EB3DD3

background

#F8F5FB

surface

#EFE9F7

border

#CAC5D0

text

#0B0512

muted

#7C7981

Preview Lab

Preview with #311FA1

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →